Every dock ramp I've seen has at least some level portion at the bottom next to the dock.
Would need more info about the dock ramp and your fiver to be totally sure by doing the math, but my best guess is you won't have an issue.
The trick is going to be to run your landing gear out as far as you can before you drop the telescoping legs. Because you will need all of that travel to drop the nose down for leveling. Hitching and unhitching won't be a problem if you do that.
Also, unless you must run the fridge, you don't have to be level for storage. You can also use ramping blocks under the wheels if necessary.
On Edit, didn't realize we were talking about an indoor dock.
